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*Maximum interface transfer rate = theoretical bus bandwidth, whereas burst transfer rate = maximum drive speed.
Performance depends on the RAID mode selected and burst transfer rates vary from one computer to another and may vary
slightly from one drive to another. Average speed is usually lower depending on host configuration.
**1TB (Terabyte) = 1000GB. 1GB = 1,000,000,000 bytes. Total accessible capacity varies depending upon operating environment
(typically 5-10% less). Capacity varies depending upon RAID mode.
***Calculations are based on 1080i 60 (8-bit) for uncompressed HD video, NTSC DV 25 standard-definition 720x486, 29.97 fps 
for digital video; and an estimation of Digital SLR resolution of 10 megapixels for RAW photos of 12MB. These calculations are only 
estimations and may vary with the codec used.

Windows XP does not support hard drives with capacities greater than 2TB.



LaCie optimized USB 3.0 driver for PC.

© 2010, LaCie. The LaCie logo is a trademark of LaCie. Other products and brand names mentioned herein may be 

trademarks or registered trademarks of their respective owners. Specifications and appearance are given as guidelines 

and may change without notice.  www.lacie.com      

101103

Box Content

• LaCie 2big USB 3.0
• 1m USB 3.0 Cable (compatible with USB 2.0)
• Power supply kit
• LaCie CD Utilities 
  - LaCie Backup software with data restore 
  for Windows

®

 and Mac

• Quick Install Guide
• LaCie USB 3.0 PCI Express Card

Minimum System Requirements

• Computer with a SuperSpeed USB 3.0 or USB 2.0 port
• Latest version of Windows XP

,Windows Vista

®

, Windows 7 / 

  Mac OS X 10.5, 10.6 (USB 2.0 only)
• Minimum free disk space: 600MB recommended

For USB 3.0 Mac compatibility:

 

Mac Pro compatible with LaCie USB 3.0 PCI Express Card 
(requires available PCI Express slot) 
MacBook

®

 Pro compatible with LaCie USB 3.0 ExpressCard/34 

(requires available ExpressCard slot)

301534 

301535 301553 

2TB 4TB 

6TB

1 x SuperSpeed USB 3.0 port (USB 2.0 and 1.1-compatible) 

SuperSpeed USB 3.0: up to 5Gb/s 
USB 2.0: up to 480Mb/s

SuperSpeed USB 3.0 Read/Write:  2TB and 4TB: 260MB/s/190MB/s
 

6TB: 306MB/s / 220MB/s



  

 

USB 2.0: Read/Write: 33MB/s / 27MB/s

7200RPM / 64MB (2 x 32MB) or greater

Easy switch-button RAID selection: RAID 0, JBOD, RAID 1

“Auto” mode for energy efficiency (default setting); “On” for instant access; “Off” for data protection

Advanced heat sink design for greater heat dissipation

93 x 200 x 183 mm / 3.7 x 7.9 x 7.2 in.

3.6 kg / 7.9 lbs.

3-year limited

Item Number

Capacity**

Interfaces

Interface Transfer Rates 

(maximum theoretical bus speed)

RAID 0 Maximum Drive Speed* 

Rotational Speed / Cache

RAID Modes

Advanced Power Management

Cooling System

Dimensions (WxDxH)

Weight

Warranty

2big USB 3.0 

D E S I G N   B Y   N E I L   P O U LTO N

LaCie USB 3.0  

ExpressCard/34

Premium 3-Year Warranty

The LaCie 2big USB 3.0 comes with a 3-Year Limited Warranty. For superior service, it also comes 

with the LaCie Advance Care Option, which can be purchased separately online within 30 days 

of the purchase date. Under the Advance Care Option, LaCie will immediately swap out the 

product without it needing to be returned first for minimal interruption of your workflow. LaCie 

covers all freight costs. Availability depends on the sales area. See www.lacie.com for details. 

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